Theo Band wrote: > What would be the best approach to debug this problem? What can be the > most likely cause? Or should I just accept it (it's a single user > desktop machine). The machine has FC4 installed. Is there a chance that > it becomes more stable with Centos (as said, I actually don't suspect > the OS). For new machines I started installing Centos (and I'm happy > with it, especially the fact that my EDA software vendors support it well). > I monitor the machine with Zabbix, but no weird things there. Just > before the freeze the machine had a processor load of 1 running a user > simulation. Turn on nmi_watchdog: http://www.mjmwired.net/kernel/Documentation/nmi_watchdog.txt#34 run memtest86+ for 24 to 48 hours. Stress your disks: for i in $(seq -w 20); do cp -ax / /tmp/$i & done (Be sure to stop the 20 cp processes before your disk(s) fill up) Mike